Diamond analyst Paul Zimnisky told the CBC that the recent Brexit vote likely affected the market for the stone.

“I think it was definitely the referendum that passed in the U.K.,” said Zimnisky. “When you look at the potential bidders of a stone that’s close to a hundred million dollars, you know these are wealthy individuals and investors that have a lot of exposure to financial assets that sold off last week with that news.”

The Lesedi la Rona means “our light” in the Tswana language of Botswana, according to Reuters.

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